<?php
mb_internal_encoding ( "UTF-8" );
header ( 'Content-Type: text/html; charset=UTF-8' );

session_start ();

$numero = $_REQUEST ['numero'];
$_SESSION ['numero'] = $numero;

?>

<!DOCTYPE html>
<html lang="es">
<head>
	<meta http-equiv="Content-Type" content="text/html" ; charset="UTF-8" />
	<title>Ejercicio 2</title>
</head>
<body>

	<form action="final.php" method="post">
		<h2>Introduce otro número</h2>
		<input type="text" name="numero">
		<input type="submit" value="Siguiente">
	</form>

</body>